A first version of the obidistutils adapted to Python3

distutils.ext/obidistutils/serenity/checkpython.py

@@ -0,0 +1,79 @@
+'''
+Created on 24 mai 2015
+
+@author: coissac
+'''
+from distutils.version import StrictVersion
+from distutils import sysconfig
+import subprocess
+import os
+import glob
+import re
+
+from obidistutils.serenity.checksystem import is_windows_system
+
+
+def is_python_version(path=None,minversion='3.4',maxversion=None):
+    '''
+    Checks that the python version is in the range {minversion,maxversion[
+    
+        @param path: if None consider the running python
+                     otherwise the python pointed by the path
+        @param minversion: the minimum version to consider
+        @param maxversion: the maximum version to consider (strictly inferior to)
+                     
+        @return: True if the python version match
+        @rtype: bool
+    '''
+    if path is None:
+        pythonversion = StrictVersion(sysconfig.get_python_version())
+    else:
+        command = """'%s' -c 'from distutils import sysconfig; """ \
+                  """print(sysconfig.get_python_version())'""" % path
+                  
+        p = subprocess.Popen(command, 
+                             shell=True, 
+                             stdout=subprocess.PIPE)
+        pythonversion=str(p.communicate()[0],'utf8').strip()
+        pythonversion = StrictVersion(pythonversion)
+                
+    return  (        pythonversion >=StrictVersion(minversion) 
+             and (   maxversion is None    
+                  or pythonversion < StrictVersion(maxversion))
+            )
+           
+
+def lookfor_good_python(minversion='3.4',maxversion=None,followLink=False):
+    '''
+    Look for all python interpreters present in the system path that
+    match the version constraints.
+    
+    @param minversion: the minimum version to consider
+    @param maxversion: the maximum version to consider (strictly inferior to)
+    @param followLink: a boolean value indicating if link must be substituted 
+                       by their real path.
+                       
+    @return: a list of path to interpreters
+    '''
+    exe = []
+    if not is_windows_system():
+        paths = os.environ['PATH'].split(os.pathsep)
+        for p in paths:
+            candidates = glob.glob(os.path.join(p,'python*')) 
+            pexe = []
+            pythonpat=re.compile('python([0-9]|[0-9]\.[0-9])?$')
+            for e in candidates:
+                print(e)
+                if pythonpat.search(e) is not None:
+                    if followLink and os.path.islink(e):
+                        e = os.path.realpath(e)
+                    if (os.path.isfile(e) and 
+                       os.access(e, os.X_OK) and 
+                       is_python_version(e,minversion,maxversion)):
+                        pexe.append(e)
+            exe.extend(set(pexe))
+        
+    return exe
+
+           
+